Glass drawing apparatus



June 28, 1932. L.. 1. PIERCE ET AL GLASS DRAWING APPARATUS Filed July 26. 1930 Z'Sheets-Sheet 2 Patented June 28, 1932 UNITED sfr- Arias- PATENT? oFiicE LONNIEJ'. AND FREDERIC L. BISHOP, OF PITTSBURGH, PENNSYLVANIA, AS- SIGNORS TO AMERICAN WINDOW GLASS COMPANY, OF PITTSBURGH, PENNSYL- 'VANIA, A CORPORATION OF PENNSYLVAN IA l GLASS DRAWING APPARATUS Application led J1f1y -26,

J tent that themolten glass wells upwardly through a slot located therein. The glass is then drawn off in sheet form by draft rollers. It is essential that the floater be submerged the proper amount and positioned in the J proper manner. fIhe usual form of depressing apparatus often proves quite unsatisfactory in that the loater isnot depressed the same amount at each end, or the proper end level is not maintained underadjustment.

We provide means whereby the oater or debiteuse may be raised or depressed uniformly on all sides simultaneously, and means whereby the adjustment may be accomplished at either end of the drawing cham-` ber. We further provide means whereby either end of the floater may be raised or lowered from either end of the drawing chamber where the adjustment stations are usuallylocated.

In the accompanying drawings we have shown for purposes`v of illustration only, a preferred embodiment of our invention.

In the accompanying drawings,

Fi re l is a transverse section through a A.dralvving chamber, a floater anddepressing I device being shown in elevation;

. Figure 2 is a horizontal section taken on the line II-II of Figure 1;

Figure 3 is a longitudinal section on the 0 'iine iii-iii of Figure i;

Figure 4 is a top plan view of an end portion of a ioater showin thereof by the depressin evice;

Figure 5 is a longitu inal section throu h 5 one of the posts employed for depressing t e floater; and l Figure 6 is a detail view of a connection em loyed for adjusting the posts.

eferrin to the drawings, there is shown a o glass drawing chamber indicated generally the engagement threaded portion 24 of a 1930. Serial No. 470,821.

by the reference character 2, which contains i in the lower portion thereof a bath B of molten lass. A'floater 3, which is usually made o clay, is partially submerged in the bath B. The floater is provided with a slot 4 through which the molten glass wells upwardly and is drawn off in the form of a sheet S by draft rollers (not shown).

Each end of the loateris provided with a i bearing plate 5 upon which rests a plurality of hollow posts 6, by means of which the Heatcit is raised or lowered. The posts 6 are slidable in the framework of the machine, as best shown in Figures 1 and 2. The posts 6 are provided at their upperl ends with a plurality of slots 7, any one of which may receive a cross in 8.

A b ock`9, having holes 20 therein for the reception of the cross pins 8, is slidably mounted in the hollow post 6. The degree of movement off'the block 9 is determined by a screw 10 operating inlan opening 11 in the side ofi tle .postsaffrii` The cross'pirrS/extends through openin 12 in the armswl of the yoke 14, lwhich 1s' keyed to a shaft 15. The block 9 is normally held in fixed position by means of a screw 16 threaded in the cap 17 of the post 6 and attache-d to the block 9 by means of a slotted lower portion which engages the washer 18. The screw 16 has a capstan head 19 for pur poses of adjustment. This individual adjustment means provided for each post 6 is no part of our invention but is described and claimed in the copending application of Henry F. Clark, Serial No. 453,556, filed May 19, 1930. c J There is a shaft 15 for each end of .the machine. It will be apparent that rocking of these shafts will operate to raiseor lower the posts 6 and consequently raise or lower the iioater 3.

Each shaft 15 is provided with an arm 21 keyed thereto. A link 22 is pivotally attached to the arm 21. The link 22 is yoked at one end so as to accommodate-a nut 23 trunnioned in the yoke.

p shaft25 rotatable in a bracket 26. Each shaft has keyed thereto a wheel 27. Each shaft 25 also has featherc Each nut 23 is threaded on a niot keyed thereto a gear 28. The shafts areV connected'together by means of a cross shaft 29 having gears 30 thereon which cooperate with the gears 28 on the shafts 25.

l 5 With both the gears 28 in cooperative rela- 1 the two shafts 25, rocking the shafts 15 through the links 22 and the arms 21, and effecting an upward or downward movement of the several posts 6.

If it is desired to raise orI lower one side l5 only of the iioater, this may be done by disengaging the gears 28 and 30 by moving gea-r 28 to the position shown in dotted lines on Figure 1 on the adjacent side and operating the adjacent hand-wheel. 2 If it is desired to depress or raise one corner of the fioater only, the screw 16 on the post 6 adjacent that corner may be individually adjusted to obtain the desired result, as described in the copending application of Henry F. Clark, Serial No. 453,556, filed May 19, 1930, above referred to.

While we have described and shown a preferred embodiment of our invention, it will be understood that it is not to be limited thereto but may be otherwise embodied within the scope of the following claims.

1. In combination with a floater for glass drawing, means for simultaneously adjusting all edges of the floater and for holding the floater in such adjusted position.

2. In combination with a oater for glass drawing, means for simultaneously adjusting all edges of the tloater equally and for 4 holding the ioater in such adjusted osition. 3. In combination with a iloater or glass drawing, a plurality of depressing devices `and means for equall and simultaneously adjusting the several epressing devices.

4. Glass drawing apparatus comprising aA drawing chamber, a loater therein, posts extending into the chamber and engaging the iioater, and means for simultaneously and equally adjusting the posts whereby all edges of the fioater may be adjusted equally.

5. Glass drawing apparatus comprising a drawing chamber, a floater therein, a plurality of depressing devices, and means for adjusting any one or more of the depressing devices from either side of the chamber.

6. Apparatus for depressing a loater for glass drawing, comprising a plurality of sets of posts engaging the ioater, and means for simultaneously and equally adjusting each set of posts from either side of the chamber.

7. Apparatus for depressing a loater for glass drawing comprising a plurality of posts engaging each end of the fioater, a shaft at each end of the chamber, links connecting the posts to` the adjacent shaft, and separate screw means operatively connected to each shaft for rocking the same.

8. Apparatus for depressing a floater for glass drawing comprising a plurality of posts engaging each end of the floater, a shaft at 7@ each end of the chamber, links connecting the posts to the adjacent shaft, separate screw means operatively connected to each shaft for rocking the same, a cross shaft connecting said screw means, and gearing whereby either shaft may be rocked by either screw means. i

9. Apparatus for depressing a oater for glass drawing comprising a plurality of posts engaging each end of the loater, a shaft at 9@ each end of the chamber, links connecting the posts to the adjacent shaft, separate screw means operatively connected to each shaft for rocking the same, a cross shaft connecting said screw means, and gearing whereby the shafts may be rocked simultaneously by either screw means.

10. Glass drawing apparatus comprising a drawing chamber, -a oater therein, depressing means at each end of the oater, means 9@ for actuating each of the depressing means, and a common drive for the actuating means extending across the drawing chamber whereby the depressing means may be separately operated from either end of the chamber.

11. Glass drawing apparatus comprising a drawing chamber, a floater therein, depressing means at each end of the floater, means for -actuating each of the depressing means, and a common drive for the actuating means extending across the drawing chamber whereby the depressing means may be simultaneously operated from either end of the chamber.

12. Apparatus for depressing a loater for 1 05 glass drawing comprising a depressing device at each end of the ioater, screw means for separately operating the depressingv devices and across shaft joining the several screw means whereby the depressing devices may be separately operated by either screw means.

13. Apparatus for depressing a floater for glass drawing comprising a depressing device at each end of t e liioater, screw means for 1 15 separately opera ing the depressing devices and a cross shaft joining the several screw means whereby the depressing devices may be simultaneously operated by either screwy means.

14. Glass drawing apparatus comprising a drawing chamber, a floater thereln, depressing means on opposite sides of the chamber extending therein and engaging the "ioater, and means for adjusting the depressing means simultaneously.

15. Glass drawing apparatus comprising a drawing. chamber, a floater therein, depressing means on opposite sides of the chamber extending therein and engaging the floater,

and means for adjusting the depressin means simultaneously from either side o the chamber.

16. Glass drawing apparatus comprising a.

drawing chamber, a loater therein, depressing means on opposite sides of the chamber extending therein and engaging the oater, and means for adjustin the depressing means on either side of t e drawin chamber from either side of the drawing c amber. In testimony whereof we have hereunto set our hands.

LONNIE J. PIERCE.

FREDERIC L. BISHOP.4 

